Denver Broncos tight end Caleb Lohner finds himself in a crowded tight end room all of a sudden, after draft picks Justin Joly and Dallen Bentley were added to the mix. After being drafted in Round 7 last season, Lohner has spent a year transitioning from a raw prospect with a basketball background into a pro tight end, but he has made serious progress, according to head coach Sean Payton .  Lohner's raw athletic ability stands out. He's 6-foot-7 and 250 pounds, but he's now competing with two rookies, including Joly, a fifth-rounder out of N.C. State. Payton wasn't the only one impressed by Lohner's display this weekend at Broncos rookie minicamp . "Super, uber-athletic," Joly said of Lohner on Saturday via The Denver Post 's Luca Evans . "He can jump out [of] the sky. Fast, quick-twitch.…